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Diffstat (limited to 'examples/scala-js/scalalib/overrides/scala/Enumeration.scala')
| -rw-r--r-- | examples/scala-js/scalalib/overrides/scala/Enumeration.scala | 284 |
1 files changed, 0 insertions, 284 deletions
diff --git a/examples/scala-js/scalalib/overrides/scala/Enumeration.scala b/examples/scala-js/scalalib/overrides/scala/Enumeration.scala deleted file mode 100644 index bdc1701..0000000 --- a/examples/scala-js/scalalib/overrides/scala/Enumeration.scala +++ /dev/null @@ -1,284 +0,0 @@ -/* __ *\ -** ________ ___ / / ___ Scala API ** -** / __/ __// _ | / / / _ | (c) 2002-2013, LAMP/EPFL ** -** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ ** -** /____/\___/_/ |_/____/_/ | | ** -** |/ ** -\* */ - -package scala - -import scala.collection.{ mutable, immutable, generic, SortedSetLike, AbstractSet } -import java.lang.reflect.{ Modifier, Method => JMethod, Field => JField } -import scala.reflect.NameTransformer._ -import java.util.regex.Pattern - -/** Defines a finite set of values specific to the enumeration. Typically - * these values enumerate all possible forms something can take and provide - * a lightweight alternative to case classes. - * - * Each call to a `Value` method adds a new unique value to the enumeration. - * To be accessible, these values are usually defined as `val` members of - * the evaluation. - * - * All values in an enumeration share a common, unique type defined as the - * `Value` type member of the enumeration (`Value` selected on the stable - * identifier path of the enumeration instance). - * - * @example {{{ - * object Main extends App { - * - * object WeekDay extends Enumeration { - * type WeekDay = Value - * val Mon, Tue, Wed, Thu, Fri, Sat, Sun = Value - * } - * import WeekDay._ - * - * def isWorkingDay(d: WeekDay) = ! (d == Sat || d == Sun) - * - * WeekDay.values filter isWorkingDay foreach println - * } - * // output: - * // Mon - * // Tue - * // Wed - * // Thu - * // Fri - * }}} - * - * @param initial The initial value from which to count the integers that - * identifies values at run-time. - * @author Matthias Zenger - */ -@SerialVersionUID(8476000850333817230L) -abstract class Enumeration (initial: Int) extends Serializable { - thisenum => - - def this() = this(0) - - /* Note that `readResolve` cannot be private, since otherwise - the JVM does not invoke it when deserializing subclasses. */ - protected def readResolve(): AnyRef = ??? - - /** The name of this enumeration. - */ - override def toString = - (getClass.getName.stripSuffix("$").split('.')).last.split('$').last - - /** The mapping from the integer used to identify values to the actual - * values. */ - private val vmap: mutable.Map[Int, Value] = new mutable.HashMap - - /** The cache listing all values of this enumeration. */ - @transient private var vset: ValueSet = null - @transient @volatile private var vsetDefined = false - - /** The mapping from the integer used to identify values to their - * names. */ - private val nmap: mutable.Map[Int, String] = new mutable.HashMap - - /** The values of this enumeration as a set. - */ - def values: ValueSet = { - if (!vsetDefined) { - vset = (ValueSet.newBuilder ++= vmap.values).result() - vsetDefined = true - } - vset - } - - /** The integer to use to identify the next created value. */ - protected var nextId: Int = initial - - /** The string to use to name the next created value. */ - protected var nextName: Iterator[String] = _ - - private def nextNameOrNull = - if (nextName != null && nextName.hasNext) nextName.next() else null - - /** The highest integer amongst those used to identify values in this - * enumeration. */ - private var topId = initial - - /** The lowest integer amongst those used to identify values in this - * enumeration, but no higher than 0. */ - private var bottomId = if(initial < 0) initial else 0 - - /** The one higher than the highest integer amongst those used to identify - * values in this enumeration. */ - final def maxId = topId - - /** The value of this enumeration with given id `x` - */ - final def apply(x: Int): Value = vmap(x) - - /** Return a `Value` from this `Enumeration` whose name matches - * the argument `s`. The names are determined automatically via reflection. - * - * @param s an `Enumeration` name - * @return the `Value` of this `Enumeration` if its name matches `s` - * @throws NoSuchElementException if no `Value` with a matching - * name is in this `Enumeration` - */ - final def withName(s: String): Value = { - val (unnamed, named) = values partition { - _.toString().startsWith("<Unknown name for enum field ") - } - - named.find(_.toString == s) match { - case Some(v) => v - // If we have unnamed values, we issue a detailed error message - case None if unnamed.nonEmpty => - throw new NoSuchElementException( - s"""Couldn't find enum field with name $s. - |However, there were the following unnamed fields: - |${unnamed.mkString(" ","\n ","")}""".stripMargin) - // Normal case (no unnamed Values) - case _ => None.get - } - } - - /** Creates a fresh value, part of this enumeration. */ - protected final def Value: Value = Value(nextId) - - /** Creates a fresh value, part of this enumeration, identified by the - * integer `i`. - * - * @param i An integer that identifies this value at run-time. It must be - * unique amongst all values of the enumeration. - * @return Fresh value identified by `i`. - */ - protected final def Value(i: Int): Value = Value(i, nextNameOrNull) - - /** Creates a fresh value, part of this enumeration, called `name`. - * - * @param name A human-readable name for that value. - * @return Fresh value called `name`. - */ - protected final def Value(name: String): Value = Value(nextId, name) - - /** Creates a fresh value, part of this enumeration, called `name` - * and identified by the integer `i`. - * - * @param i An integer that identifies this value at run-time. It must be - * unique amongst all values of the enumeration. - * @param name A human-readable name for that value. - * @return Fresh value with the provided identifier `i` and name `name`. - */ - protected final def Value(i: Int, name: String): Value = new Val(i, name) - - /** The type of the enumerated values. */ - @SerialVersionUID(7091335633555234129L) - abstract class Value extends Ordered[Value] with Serializable { - /** the id and bit location of this enumeration value */ - def id: Int - /** a marker so we can tell whose values belong to whom come reflective-naming time */ - private[Enumeration] val outerEnum = thisenum - - override def compare(that: Value): Int = - if (this.id < that.id) -1 - else if (this.id == that.id) 0 - else 1 - override def equals(other: Any) = other match { - case that: Enumeration#Value => (outerEnum eq that.outerEnum) && (id == that.id) - case _ => false - } - override def hashCode: Int = id.## - - /** Create a ValueSet which contains this value and another one */ - def + (v: Value) = ValueSet(this, v) - } - - /** A class implementing the [[scala.Enumeration.Value]] type. This class - * can be overridden to change the enumeration's naming and integer - * identification behaviour. - */ - @SerialVersionUID(0 - 3501153230598116017L) - protected class Val(i: Int, name: String) - extends Value with Serializable { - - def this(i: Int) = this(i, nextNameOrNull) - def this(name: String) = this(nextId, name) - def this() = this(nextId) - - assert(!vmap.isDefinedAt(i), "Duplicate id: " + i) - vmap(i) = this - vsetDefined = false - nextId = i + 1 - if (nextId > topId) topId = nextId - if (i < bottomId) bottomId = i - def id = i - override def toString() = - if (name != null) name - // Scala.js specific - else s"<Unknown name for enum field #$i of class ${getClass}>" - - protected def readResolve(): AnyRef = { - val enum = thisenum.readResolve().asInstanceOf[Enumeration] - if (enum.vmap == null) this - else enum.vmap(i) - } - } - - /** An ordering by id for values of this set */ - object ValueOrdering extends Ordering[Value] { - def compare(x: Value, y: Value): Int = x compare y - } - - /** A class for sets of values. - * Iterating through this set will yield values in increasing order of their ids. - * - * @param nnIds The set of ids of values (adjusted so that the lowest value does - * not fall below zero), organized as a `BitSet`. - */ - class ValueSet private[ValueSet] (private[this] var nnIds: immutable.BitSet) - extends AbstractSet[Value] - with immutable.SortedSet[Value] - with SortedSetLike[Value, ValueSet] - with Serializable { - - implicit def ordering: Ordering[Value] = ValueOrdering - def rangeImpl(from: Option[Value], until: Option[Value]): ValueSet = - new ValueSet(nnIds.rangeImpl(from.map(_.id - bottomId), until.map(_.id - bottomId))) - - override def empty = ValueSet.empty - def contains(v: Value) = nnIds contains (v.id - bottomId) - def + (value: Value) = new ValueSet(nnIds + (value.id - bottomId)) - def - (value: Value) = new ValueSet(nnIds - (value.id - bottomId)) - def iterator = nnIds.iterator map (id => thisenum.apply(bottomId + id)) - // This is only defined in 2.11. We change its implementation so it also - // compiles on 2.10. - def keysIteratorFrom(start: Value) = from(start).keySet.toIterator - //nnIds keysIteratorFrom start.id map (id => thisenum.apply(bottomId + id)) - override def stringPrefix = thisenum + ".ValueSet" - /** Creates a bit mask for the zero-adjusted ids in this set as a - * new array of longs */ - def toBitMask: Array[Long] = nnIds.toBitMask - } - - /** A factory object for value sets */ - object ValueSet { - import generic.CanBuildFrom - - /** The empty value set */ - val empty = new ValueSet(immutable.BitSet.empty) - /** A value set consisting of given elements */ - def apply(elems: Value*): ValueSet = (newBuilder ++= elems).result() - /** A value set containing all the values for the zero-adjusted ids - * corresponding to the bits in an array */ - def fromBitMask(elems: Array[Long]): ValueSet = new ValueSet(immutable.BitSet.fromBitMask(elems)) - /** A builder object for value sets */ - def newBuilder: mutable.Builder[Value, ValueSet] = new mutable.Builder[Value, ValueSet] { - private[this] val b = new mutable.BitSet - def += (x: Value) = { b += (x.id - bottomId); this } - def clear() = b.clear() - def result() = new ValueSet(b.toImmutable) - } - /** The implicit builder for value sets */ - implicit def canBuildFrom: CanBuildFrom[ValueSet, Value, ValueSet] = - new CanBuildFrom[ValueSet, Value, ValueSet] { - def apply(from: ValueSet) = newBuilder - def apply() = newBuilder - } - } -}
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